喺物理學上,一個場(field)係一個用一個數值或者張量表達嘅物理量,喺時間同空間嘅每個點嗰度都有個數值。例如係一個電場(electric field)噉,表示一個電場嘅數值同張量會話俾人知「喺空間同時間嘅呢一點同呢一點當中,一嚿帶電荷嘅物體會受到幾勁嘅電磁力」。
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